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Finding the Fourth Proportional to 571.49, 857.03 and 206.22

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Solution

The fourth proportional to 571.49, 857.03 and 206.22 is: 309.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.49 : 857.03 = 206.22 : x
  2. Step 2: Convert to fraction form
    571.49/857.03 = 206.22/x
  3. Step 3: Cross multiply
    571.49x = 857.03 × 206.22
  4. Step 4: Simplify right side
    571.49x = 176,735.70
  5. Step 5: Solve for x
    x = 176,735.70/571.49
  6. Step 6: Final answer
    x = 309.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.